Using sending domain authentication

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Email Encryption
For emails containing confidential or important information, it is also effective to use email encryption.

If the personal information contained in an email is seen by a third party, it could develop into a major problem leading to personal information leaks.

However, by encrypting your email, you can prevent the risk of your information being stolen by a third party.

SSL/TLS is a commonly used method of international mailing list encrypting communications.

Among these, there is a method called STARTTLS that is specialized for email, which can be easily implemented if your email client or email server supports it.




What is STARTTLS? Explaining the mechanism of email encryption and its advantages and disadvantages
"STARTTLS" is a mechanism for encrypting communication when sending email. Specifically, it encrypts communication from the sending mail server to the receiving mail server. This prevents the email body from being stolen, tampered with, or hacked during communication.
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Spoofed emails sent from a forged sender name may contain links that lead to dangerous sites.

Using sending domain authentication is an effective measure against spoofed emails and false sender domains.

There are three types of sending domain authentication: SPF, DKIM, and DMARC.

"SPF" judges whether the sent email is legitimate based on the sender's IP address. "DKIM" detects spoofing by adding a digital signature to the email.

Additionally, DMARC allows you to instruct the receiving server how to handle an email if it does not pass SPF or DKIM validation.




What is DKIM? A simple explanation of how it works and its effectiveness against spam
DKIM is a technology for authenticating sending domains using digital signatures. It is called "Dee-Kim" and is an abbreviation of "DomainKeys Identified Mail". The recipient's mail server compares the digital signature added to the header of the email with the public key (publicly available and necessary for encryption) published by the sending domain's DNS to evaluate the legitimacy of the email sender and the email body.
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Understand in 10 minutes! What is SPF? Explaining how SPF records work and how to set them up
This time, we will tell you about "SPF", which is effective in preventing spam. SPF (Sender Policy Framework) is a sending domain authentication method that verifies whether the sender domain is not spoofed when sending and receiving email.
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What is the purpose of email security measures?
Here are three purposes for taking the email security measures mentioned above:



Protection of personal and confidential information
Emails contain a variety of important information.

For example, personal information such as email addresses, company names, and confidential information between companies.

Many companies use email on a daily basis for their business operations, but without security measures, it could lead to information leaks and financial losses such as compensation, which could have a major impact on the survival of the company.

By implementing email security measures, you can protect personal and confidential information from unauthorized access, eavesdropping, tampering, etc.